Decades: 90s BC 80s BC 70s BC 60s BC 50s BC - 40s BC - 30s BC 20s BC 10s BC 0s BC 0s

Years: 52 BC 51 BC 50 BC 49 BC 48 BC 47 BC 46 BC 45 BC 44 BC 43 BC 42 BC

• February - Roman general Julius Caesar and his ally Cleopatra VII of Egypt defeat the forces of the rival Egyptian Queen Arsinoe IV in the Battle of the Nile.
• May - Julius Caesar defeated Pharnascus, king of the Bosporus in the Battle of Zela. (This is the war that Caesar tersely described veni, vidi, vici.)
• Pharaoh Cleopatra VII of Egypt promotes her younger brother Ptolemy XIV of Egypt to co-ruler.

• June 23 - Prince Caesarion of Egypt, later Pharaoh Ptolemy XV.